I am using HDL Coder to generate verilog code. HDL Coder can also generate test bench. I find that HDL Coder generates two set of files for the synthesis code and test bench code on the filter components. This is different from my VHDL/verilog practice. I have compared the filter VHDL components for synthesis and test bench. There are some differences internally. HDL Coder can garantiee that the test bench and synthesis components are equivalent?